William Harvey and his great discovery

No matter how great the role of blood in our body, performing this role, supply to the cells of the body all necessary and destruction of metabolites possible only because the blood moving. If there were no cardiovascular system, causing the blood in a continuous movement, the presence of blood would have no meaning. No wonder with the termination of the heart is stopped and the life. So that blood can not be separated from the immense importance of the circulatory system.
This system consists of the muscle pump - the heart and from the mass spreading the blood of the tubes - the blood vessels. Therefore it is called the cardiovascular system. In addition, blood and its movement inextricably linked functions of lymph. To understand properly the work of the heart, blood vessels and lymphatic system, we must first of all clearly about the laws of blood circulation in General.
William HarveyWilliam Harvey and his great discovery.
Since ancient times people were interested in the work of the heart is a remarkable organ, which runs continuously throughout life, which pushes the blood through the vessels in our body. However, for thousands of years the laws of motion of blood had been misunderstood.
Dissecting corpses, doctors and scientists saw that the heart is a muscular bag the size of a fist. Inside it is divided by partitions into four cameras. One partition divides it into right and left halves, not interconnected. Another divides each of the halves for another two cameras - the atrium and the ventricle. Between these cameras have holes with the valves, letting blood from the atrium to the ventricle, but do not pass it back into the atrium. From the heart departs a number of large vessels: from the right atrium, the upper and the lower hollow vein, from the right ventricle and pulmonary artery, from the left ventricle and the aorta. In the place of discharge of the pulmonary artery and the aorta from the ventricles are also the valves, letting blood vessels, but not allow it to return to the ventricles.
Pulmonary artery and pulmonary veins are coming to light. The aorta cava, branching out, send vessels to all other organs, and - and this seemed especially strange to every body necessarily go together and artery and vein. What is the meaning of such a device, one could not understand. Thought through the veins to the bodies of flowing blood, carrying nutrients and arteries run "vital spirits". Instead absorbed by the organs of blood to the liver creates all new portions of it. The idea that blood flows only in his veins, was reinforced by the fact that the corpse in the arteries blood, as a rule, was not. All the blood was in the veins. The reasons for this phenomenon we'll talk further.
Some scientists in the XVI century began to approach more correct views, but their voices were not heard, and the famous Spanish doctor Miguel Servet was declared their disagreement with the Church a heretic and burned along with his book on fire in 1553.
Only in 1628 English scientist William Harvey solved the mystery of blood circulation. In his book "On the movement of blood," he said arteries and veins have opposite purpose that by the body the blood flows only in the artery, and in Vienna returns back to the heart. In other words, Harvey discovered that the same amount of blood does in the body in a circular motion. It seems to us now itself is understandable, but in those days it was a revolution in science, for it was contrary to the teachings of the ancient authorities. Harvey was met with hostility, but he boldly stated: "I find that anatomists have to learn and teach, not from books... but in the workshop of nature".
Harvey called for experimental study of the body and provided so much indisputable facts in support of his teaching that not only defeated enemies, but firmly put into the science about the work of our body that, experiment. As we have said, this was used as the basis for the creation of a truly scientific physiology. Opening of Harvey is the date of its birth. In 1988 she was, therefore, 360 years.